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Context{The high energy emission regions of rotation powered pulsars arestudied using folded light curve (FLCs) and phase resolved spectra (PRS).}aims{This work uses the NICER observatory to obtain the highest resolution FLCand PRS of the Crab pulsar at soft X-ray energies.} methods{NICER hasaccumulated about 347 ksec of data on the Crab pulsar. The data are processedusing the standard analysis pipeline. Stringent filtering is done for spectralanalysis. The individual detectors are calibrated in terms of long time lightcurve (LTLC), raw spectrum and deadtime. The arrival times of the photons arereferred to the solar system's barycenter and the rotation frequency $\nu$ andits time derivative $\dot \nu$ are used to derive the rotation phase of eachphoton.} results{The LTLCs, raw spectra and deadtimes of the individualdetectors are statistically similar; the latter two show no evolution withepoch; detector deadtime is independent of photon energy. The deadtime for theCrab pulsar, taking into account the two types of deadtime, is only approx 7%to 8% larger than that obtained using the cleaned events. Detector 00 behavesslightly differently from the rest, but can be used for spectral work. The PRSof the two peaks of the Crab pulsar are obtained at a resolution of better than1/512 in rotation phase. The FLC very close to the first peak rises slowly andfalls faster. The spectral index of the PRS is almost constant very close tothe first peak.} conclusions{The high resolution FLC and PRS of the {{peaks}}of the Crab pulsar provide important constraints for the formation of causticsin the emission zone.}

Phase resolved spectrum of the Crab pulsar from NICER